Crushing or grinding mill



No. 624,774. Pathted May '9, I899.

n. ELLIN.

CRUSHING 0B GRINDING MILL.

(Applicatioh'filed Mar. 3, 1898.)

(No Model.) 2 Sheets-Sheet I.

v i r l 9 *2 "WIN" g A 2o 3 1 Q; I \II h J w fi 9f 2 i a J) 'INVENTOR Roer-[gain ATTORNEYS we cams PETERS co PHOTO LITHO., wnsnworuu, m c,

No. 624.774. Patented May 9,1899.

n. ELLIN.

BBUSHING 0B GRINDING MILL. (Application am; Mar. 8, 1898.) (No Model.) 2Sheets-Shaet 2 a3 WITNESSES: U 9 zy INVENTOER I 1 Y RoZemEZZz'n 1 J0 JATTORNEYS is a section along 00 m, Fig. 2.

NITED STATES PATENT OFFICE.

ROBERT ELLIN, OF YONKERS, NEW YORK.

CRUSHING OR GRINDING MILL.

SPECIFICA'JPION forming part of Letters Patent 110,624,774, dated May 9,1899. Application filed March a, 1898. Serial No. 672,426. on model- Toall whom ifmay concern:

Be it known that 1, ROBERT ELLIN, a citizen of the United States,residing at Yonkers, in the county of Westchester and State of New York,have invented new and useful Improvements in Crushing or Grinding Mills,of which the following is a specification.

B y means of this invention a mill is obtained which can be readily setfor the required work and effectively fed, as set forth in the following specification and claims and illustrated in the annexed drawings, inwhich- Figure 1 is a sectional elevation of the mill. Fig. 2 is asection along w, Fig. 1. Fig. 3

Fig. 4 is a section along y y, Fig. 2. z 2, Fig. 2.

These mills, as known, have revolving,-

crushing, or grinding wheels 1, generally three or four in number,although this number can be varied. The wheels are ranged about or runover the bottom 2 of a pan or chamber and are shown with their shafts 3having bearings or sleeves 4, jointed or hinged at 5 to a central orupright shaft 6, suitably rotated by any suitable mean s-as, forexample, by gears '7, 8, and 9, Fig. 1. The sleeves or bearings 4 areeach shown with a lug or tapped eye 10 for the engagement of-screw 11.

Between screw 11 and driving-shaft 6 is braced discharging at mouths 18on the bottom 2 in front of the wheels 1. If seen fit, the mate- Fig. 5is a section along inserted into a suitable tap in the main frameorsupport of the'mill, and by rotating the body 21 the shoulder orbearing 20 can be set higher or lower.

The shaft 6 is shown with a shoulder 22, be tween which and the bearing20 is a spring or elastic or yielding ring 23, a metallic ring 24,

ing-wheels encountering pieces of material that are not readily crushedand also to per-% mit of the vertical. adjustment of the shaft. Bysetting or turning the bearing 20 higher or lower the shaft, with thewheels 1, is setin proper positionrelative to bottom 2 or to thematerial under treatment. The shoulder 29 prevents shaft 6 lifting orrisingout of place, and such shoulder can be adjusted as required forsnugly confining the balls 28. Said balls 28 and 25 ease the rotation ofthe shaft.

The bearing 20 can be rotated or set by gear 31, Fig. 1, suitablyfeathered on thimble 21 and actuated by miter-gear 32 and shaft 33,suitably located to be in reach or accessible to the attendant. The gear31 is suitably supported by ring or carrier 34, secured to the mainframe or support 35 of the machine. By mounting gear 31 onantifriction-balls its rotation is eased. The rotation of gear 31 and ofscrew ,30 will effect adjustment, as seen.

The side of the pan is provided with or formedbya screen 36, as iscustomary in'mills of this kind, The feed 13 or 19, being central orwithin the arrangement of wheels 1}, is in position to effectivelysupply material to each wheel through the mouth parts 18 of conduits 17.The gear 8 is shown drum-shaped or of such size that the shaft 6,withits gear 7, can be adjusted or move without losing mesh. The centralhopper revolving with or forming part of shaft 6, said hopper beingprovided with conduit or pipes, the proper proportion of material to becrushed is conveyed and deposited simultaneously, constantly, and withcertainty upon the circular die or crushingpath 2 immediatelyin front ofeach crushingwheel.

What I claim as new, and desire to secure by Letters Patent, is

1. In a grinding-mill, the combination with a pan and grinding-wheels,of a centrally-an; ranged hollow shaft provided with a feed-hopper andhaving a plurality of perforations formed at a point beneath the hopper,a conical distributer arranged in'said hollow shaft, the base of saidconical distributer extending v entirely to the inner wall of the hollowshaft at a point immediately below the perforations I therein, and aplurality of feed-chutes.lead-- ing from said perforations andterminating between the grinding-wheels, substantially as j described.

2. In a grinding-mill, the combination with a pan and grinding-wheels,of a'central-ly-arranged hollow shaft provided with afeed-hoppersurrounding vthe shaft and provided with a-discharge enddisposed centrally within the' shaft, said shaft having a plurality -offeedopenings establishing communication be tween the upper outer portionand the inner lower portion of the hopper, a conical distr-i-buterarranged in the hollow shaft beneath I the hopper, and a plurality offeed-chutes leading from the hollow shaft at the baseof I thedistributor downwardly between the grinding-wheels, substantially asdescribed.

hinged to the shaft, horizontal shafts journaled in said sleeves andcarrying at their outer ends grinding-wheels arranged to travel in acircular path in said pan, springs arranged above the sleeves andhearing at one end against the upright shaft and at their oppo- 40 siteends against a support on the upper side of the sleeves, and means foradjusting the tension of the springs, substantially as described.

4. In a grind'ing-mill,the combination withscrew-sandtheupright-shaft,horizontalshafts 5o journaled inthesleeves,.and grinding-wheels mounted on the outer ends-of saidshaftsand arranged to travel in a circular path in the pan, said-screwsopera-ting to adjust the tension of said springs and press the wheelsinto

